docs: def segment_into_chars(utterance: str) -> str:
      """ Segments an utterance into space delimited characters. """
  
      if not isinstance(utterance, str):
          raise TypeError("Input type must be a string. Got {}.".format(type(utterance)))
  
      utterance.strip()
      utterance = utterance.replace(" ", "")
      return " ".join(utterance)